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WILL MARK BRAINLIEST IS CORRECT a 25-N box is pushed across the ground at a constant

WILL MARK BRAINLIEST IS CORRECT a 25-N box is pushed across the ground at a constant speed the applied force is 18 N what is the coefficient of friction between the box and the ground
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photagraphykid
photagraphykid
4,5(23 marks)
C. frequency

it is a unique property of electromagnetic waves that they all electromagnetic waves produced from same material/source will have the same frequency. 

electromagnetic waves will only have same velocity when travelling in a vacuum. 

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